Premium
Relation of Genes from Hope and Red Egyptian Wheat for Reaction to Stem Rust 1
Author(s) -
Williams N. D.,
Miller J. D.
Publication year - 1973
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1973.0011183x001300030030x
Subject(s) - stem rust , biology , gene , puccinia , inoculation , allele , race (biology) , botany , rust (programming language) , genetics , plant disease resistance , horticulture , mildew , computer science , programming language
Wheat ( Triticum aestivum ) line ISr9d‐Ra, having a gene ( Sr9d ) for resistance to stem rust ( Puccinia graminis f. sp. tritici ) from ‘Hope’, was crossed with ISr9a‐Ra, having a gene ( Sr9a ) for resistance from ‘Red Egyptian.’ The purpose of the cross was to investigate the linkage or allelic relations between the two genes. The F 2 and F 3 were inoculated simultaneously with a culture of stem rust race 121 having grey‐brown urediospores and a culture of race 29 having reddish‐brown urediospores. We did not recover recombinants among 746 gametes from F 1 plants heterozygous for the two genes and 4140 seedlings from heterozygous F 2 plants. The genes from Hope and Red Egyptian were allelic or closely linked.